Well from what i gathered on information is that you need a lot of gas in order to have a comp working in general.
Kneelingatlas mentioned that a 5 port comp will not be efficient, especially with minor loads which seems not to generate enough gas to operate the comp.
Therefore I was considering to load major if with a 90 gr or 115 or 124gr bullet that I will see.
The industry advertise this small 2 -5 port comps, but is it really enough to keep the muzzle from rising?